package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Service;
import com.itheima.dao.PermissionDao;
import com.itheima.dao.RoleDao;
import com.itheima.dao.UserDao;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.itheima.entity.PageResult;
import com.itheima.entity.QueryPageBean;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

/**
 * 用户服务
 */
@Service(interfaceClass = UserService.class)
@Transactional
public class UserServiceImpl implements UserService {
    @Autowired
    private UserDao userDao;
    @Autowired
    private RoleDao roleDao;
    @Autowired
    private PermissionDao permissionDao;

    //根据用户名查询用户信息,包括用户的角色和角色关联的权限
    public User findByUsername(String username) {
        User user = userDao.findByUsername(username);//根据用户名查询用户表
        if (user == null) {
            return null;
        }
        Integer userId = user.getId();
        //根据用户id查询关联的角色
        Set<Role> roles = roleDao.findByUserId(userId);
        if (roles != null && roles.size() > 0) {
            //遍历角色集合，查询每个角色关联的权限
            for (Role role : roles) {
                Integer roleId = role.getId();//角色id
                //根据角色id查询关联的权限
                Set<Permission> permissions = permissionDao.findByRoleId(roleId);
                if (permissions != null && permissions.size() > 0) {
                    //角色关联权限集合
                    role.setPermissions(permissions);
                }
            }
            //用户关联角色集合
            user.setRoles(roles);
        }
        return user;
    }

    @Override
    public PageResult findPage(QueryPageBean queryPageBean) {
        Integer currentPage = queryPageBean.getCurrentPage();
        Integer pageSize = queryPageBean.getPageSize();
        String queryString = queryPageBean.getQueryString();//ThreadLocal
        PageHelper.startPage(currentPage, pageSize);//分页插件，会在执行sql之前将分页关键字追加到SQL后面
        Page<User> page = userDao.findByCondition(queryString);
        return new PageResult(page.getTotal(), page.getResult());
    }

    //编辑用户信息，同时需要设置关联关系
    @Override
    public void addUser(User user, Integer[] roleIds) {
        userDao.addUser(user);
        //重新建立检查组和检查项的关联关系
        this.setUserAndRole(user.getId(), roleIds);
    }

    @Override
    public void addUserRoles(Integer[] roleIds, User user) {
        //获取用户的id
        Integer userId = user.getId();
        //编辑用户信息
        userDao.edit(user);
        //删除关联关系
        userDao.deleteAssociation(user.getId());

        if (userId != null && roleIds.length > 0) {
            for (Integer roleId : roleIds) {//检查项id
                Map<String, Integer> UserAndRole = new HashMap<>();
                UserAndRole.put("userId", userId);
                UserAndRole.put("roleId", roleId);
                userDao.setRole(UserAndRole);
            }
        }
    }

    //删除用户
    public void delete(Integer id) {
        Long count = userDao.selectCountByUserId(id);
        if (count > 0) {
            //已经被关联，先删除关系表
            userDao.deleteAssociation(id);
        }
        //删除用户
        userDao.deleteById(id);
    }

    @Override
    public User findById(Integer userId) {
        return userDao.findById(userId);
    }

    //设置检查组和检查项多对多关系
    public void setUserAndRole(Integer userId, Integer[] roleIds) {
        //设置多对多关系
        if (userId != null && roleIds.length > 0) {
            for (Integer roleId : roleIds) {//检查项id
                Map<String, Integer> map = new HashMap<>();
                map.put("userId", userId);
                map.put("roleId", roleId);
                userDao.setUserAndRole(map);
            }
        }
    }
}